package com.gerenboke.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.gerenboke.constans.SystemConstants;
import com.gerenboke.domain.ResponseResult;
import com.gerenboke.domain.dto.AddArticleDto;
import com.gerenboke.domain.entity.Article;
import com.gerenboke.domain.entity.ArticleTag;
import com.gerenboke.domain.entity.Category;
import com.gerenboke.domain.vo.*;
import com.gerenboke.mapper.ArticleMapper;
import com.gerenboke.service.ArticleService;
import com.gerenboke.service.ArticleTagService;
import com.gerenboke.service.CategoryService;
import com.gerenboke.utils.BeanCopyUtils;
import com.gerenboke.utils.RedisCache;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;


import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import java.util.stream.Collectors;

@Service
public class ArticleServiceImpl extends ServiceImpl<ArticleMapper, Article> implements ArticleService {

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisCache redisCache;

    @Autowired
    private ArticleTagService articleTagService;

    @Autowired
    private ArticleMapper articleMapper;

    @Override
    public ResponseResult hotArticleList() {
        //查询热门文章 封装成ResponseResult返回
        LambdaQueryWrapper<Article> queryWrapper = new LambdaQueryWrapper<>();
        //必须是正式文章
        queryWrapper.eq(Article::getStatus, SystemConstants.ARTICLE_STATUS_NORMAL);
        //按照浏览量进行排序
        queryWrapper.orderByDesc(Article::getViewCount);
        //最多只查询10条
        Page<Article> page = new Page(1,10);
        page(page,queryWrapper);

        List<Article> articles = page.getRecords();
        List<HotArticleVo> articleVos = new ArrayList<>();
        //bean拷贝
//        for (Article article : articles) {
//            HotArticleVo vo = new HotArticleVo();
//            BeanUtils.copyProperties(article,vo);
//            articleVos.add(vo);
//        }
        List<HotArticleVo> vs = BeanCopyUtils.copyBeanList(articles, HotArticleVo.class);
        return ResponseResult.okResult(vs);
    }

    @Override
    public ResponseResult articleList(Integer pageNum, Integer pageSize, Long categoryId) {
        //查询条件
        LambdaQueryWrapper<Article> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        //判空
        lambdaQueryWrapper.eq(Objects.nonNull(categoryId) && categoryId > 0,Article::getCategoryId,categoryId);
        //状态是正式发布的
        lambdaQueryWrapper.eq(Article::getStatus,SystemConstants.ARTICLE_STATUS_NORMAL);
        //对isTop进行降序
        lambdaQueryWrapper.orderByDesc(Article::getIsTop);
        //分页查询
        Page<Article> page = new Page<>(pageNum,pageSize);
        page(page,lambdaQueryWrapper);

        //查询categoryName
        List<Article> articles = page.getRecords();
        //articleId查询categoryName
//        for (Article article : articles) {
//            Category category = categoryService.getById(article.getCategoryId());
//            article.setCategoryName(category.getName());
//        }
        articles.stream()
                .map(article -> article.setCategoryName(categoryService.getById(article.getCategoryId()).getName())).collect(Collectors.toList());


        //封装查询结果
        List<ArticleListVo> articleListVos = BeanCopyUtils.copyBeanList(page.getRecords(), ArticleListVo.class);
        PageVo pageVo = new PageVo(articleListVos, page.getTotal());
        return ResponseResult.okResult(pageVo);
    }

    @Override
    public ResponseResult getArticleDetail(Long id) {
        //根据id查询文章
        Article article = getById(id);
        //从redis中获取viewCount
        Integer viewCount = redisCache.getCacheMapValue("article:viewCount", String.valueOf(id));
        article.setViewCount(viewCount.longValue());
        //转换成VO
        ArticleDetailVo articleDetailVo = BeanCopyUtils.copyBean(article, ArticleDetailVo.class);
        //根据分类id查询分类名
        Long categoryId = articleDetailVo.getCategoryId();
        Category category = categoryService.getById(categoryId);
        if(category!=null){
            articleDetailVo.setCategoryName(category.getName());
        }
        //封装响应返回
        return ResponseResult.okResult(articleDetailVo);
    }

    @Override
    public ResponseResult updateViewCount(Long id) {
        //更新redis中对应 id的浏览量
        redisCache.incrementCacheMapValue("article:viewCount",id.toString(),1);
        return ResponseResult.okResult();
    }

    @Override
    public ResponseResult add(AddArticleDto articleDto) {
        //添加 博客
        Article article = BeanCopyUtils.copyBean(articleDto, Article.class);
        save(article);


        List<ArticleTag> articleTags = articleDto.getTags().stream()
                .map(tagId -> new ArticleTag(article.getId(), tagId))
                .collect(Collectors.toList());

        //添加 博客和标签的关联
        articleTagService.saveBatch(articleTags);
        return ResponseResult.okResult();
    }

    @Override
    public ResponseResult likeList(Long pageNum, Long pageSize, String title, String summary) {
        LambdaQueryWrapper<Article> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.like(Objects.nonNull(title),Article::getTitle,title);
        queryWrapper.like(Objects.nonNull(summary),Article::getSummary,summary);
        Page<Article> page = new Page<>(pageNum,pageSize);
        page(page,queryWrapper);
        List<ArticleVo> articleVos = BeanCopyUtils.copyBeanList(page.getRecords(), ArticleVo.class);
        PageVo pageVo = new PageVo(articleVos,page.getTotal());
        return ResponseResult.okResult(pageVo);
    }

    @Override
    public ResponseResult selectGetArticle(Long id) {
        Article article = getById(id);
        ArticleAndUpdateVo articleAndUpdateVo = BeanCopyUtils.copyBean(article, ArticleAndUpdateVo.class);
        List<String> tags = articleMapper.selectGetArticle(id);
        articleAndUpdateVo.setTags(tags);
        return ResponseResult.okResult(articleAndUpdateVo);
    }

    @Override
    @Transactional
    public ResponseResult updateArticle(UpdateArticleVo updateArticleVo) {
        Article article = BeanCopyUtils.copyBean(updateArticleVo, Article.class);
        article.setId(Long.valueOf(updateArticleVo.getId()));
        List<String> tags = updateArticleVo.getTags();
        articleMapper.deleteArticleTag(article.getId());
        for (String tag : tags) {
            articleMapper.updateArticleTag(article.getId(),Long.valueOf(tag));
        }
        return ResponseResult.okResult();
    }

    @Override
    @Transactional
    public ResponseResult deleteArticle(Long id) {
        articleMapper.deleteById(id);
        articleMapper.deleteArticleTag(id);
        return ResponseResult.okResult();
    }
}
